Exercise bar



FIG. 1 is a perspective view of an exercise bar according to the present design;

FIG. 2 is a top view of the exercise bar, the bottom view is identical thereto;

FIG. 3 is a right end view of the exercise bar, the opposite end view being identical thereto; and,

FIG. 4 is a side view of the exercise bar, the opposite side view being identical thereto. 

We claim the ornamental design for an exercise bar, as shown and described. 